Variation of condition 10 of planning permission dated 31 August 2022 (RN: 22/02609/FULL) for 'Demolition of 55-58 Pall Mall and 1-4 Crown Passage, and erection of a new building with a part retained facade comprising basement, ground and six upper floors plus mezzanine with a new raised height mansard roof level, to provide office (Class B1) use at basement, part ground to seventh floor level, and provision of two flexible retail/ restaurant (Class A1/ A3) units at part ground level. Creation of terraces at 5th, 6th floor level and 6th floor mezzanine level, installation of plant, and provision of cycle parking spaces and facilities'. Namely, to vary the wording of condition 10 to allow a dual swing escape door on the Pall Mall elevation which will be inward opening for everyday access but will be able to open outward in the case of an emergency, in the event of a fire, or suchlike event.

Variation of condition 4 of planning permission dated 26th November 2021 (RN:21/05740/FULL) for the Variation of Condition 1 of planning permission dated 16 March 2016 (RN: 16/00374/FULL) which itself varied condition 1 of planning permission dated 28 July 2015 (RN: 15/02336/FULL) for excavation of a basement beneath existing building, part of front and rear gardens, demolition of rear facade, extensions to the rear and at roof level in connection with the use of the building as a single house. Namely, the proposed revised material for the bricks, the top crown roof changed from asphalt to lead, rear bay changed to brickwork, rear bay coping changed to Portland stone and lower ground floor rear doors changed to French doors. NAMELY to alter facing materials

Amendments to planning permission dated 31 August 2022 (RN: 22/02609/FULL) (which varied planning permission dated 07 December 2020 (RN: 20/03048/FULL (as amended by 22/01515/NMA)) for 'Demolition of 55-58 Pall Mall and 1-4 Crown Passage, and erection of a new building with a part retained facade comprising basement, ground and six upper floors plus mezzanine with a new raised height mansard roof level, to provide office (Class B1) use at basement, part ground to seventh floor level, and provision of two flexible retail/ restaurant (Class A1/ A3) units at part ground level. Creation of terraces at 5th, 6th floor level and 6th floor mezzanine level, installation of plant, and provision of cycle parking spaces and facilities'. Namely, to allow amendments including, Internal revisions to layout and detail of door openings throughout ground to fourth floors; Lobby area added to secondary stairwell at first to fourth floor levels; Revised arrangement of openable doors at fifth and sixth floor level, onto terrace area; Tenant plant enclosure line adjusted to allow for interfacing with lift overrun; Door opening onto Crown Passage recessed to allow doors to open outwards within site boundary; Wall linings altered to reflect amendments to party wall information; Basement layout altered and associated revision of cycle parking layout, reducing the number of cycle parking spaces from 100 to 99; Maintenance access door added within basement; Revisions to fenestration detailing on southeast elevation; Revised materials to southwest and northeast elevations; Relocation of smoke extract system on roof; and Inclusion of door within plant screen for cleaning and maintenance purposes.

Partial demolition of building and erection of new extensions at ground and first floor levels, alterations to roof, basement excavation, alterations to windows and doors, new boundary wall treatment facing Elm Tree Road, repositioning of pedestrian gate and hard and soft landscaping works.

Alterations and extensions, including demolition and reconstruction of rear extensions, excavation of basement floor, removal of tree, alterations to front boundary wall, installation of mechanical plant, erection of cupola at roof level, use of part of garden to rear of No.8 Ordnance Hill, and internal works to all floor levels in connection with the use of the building as five residential apartments.

Amendments to planning permission dated 27th March 2019 (RN: 17/02394/FULL) for alterations and extensions, including demolition and reconstruction of rear extensions, excavation of basement floor, removal of tree, alterations to front boundary wall, installation of mechanical plant, erection of cupola at roof level, use of part of garden to rear of No.8 Ordnance Hill, and internal works to all floor levels in connection with the use of the building as five residential apartments (2x3 bed, 2x2 bed, and 1x1 bed flats) NAMELY, for the rewording of condition 22 (below-ground contamination).

Amendments to planning permission dated 27 March 2019 (RN: 17/02394/FULL) for alterations and extensions, including demolition and reconstruction of rear extensions, excavation of basement floor, removal of tree, alterations to front boundary wall, installation of mechanical plant, erection of cupola at roof level, use of part of garden to rear of No.8 Ordnance Hill, and internal works to all floor levels in connection with the use of the building as five residential apartments (2x3 bed, 2x2 bed, and 1x1 bed flats); namely, the insertion of a new sash window to match the existing windows in the East elevation of the original chapel building; the introduction of powder coated aluminium windows within the new rear block, providing a consistent design approach within this new part of the building, and allowing an enhanced environmental performance to be achieved; and the simplification of the façade treatment of this new part of the building, (simplified cornice detailing, omission of window surround detail)

Amendments to planning permission dated 27 March 2019 (RN: 17/02394/FULL) for 'alterations and extensions, including demolition and reconstruction of rear extensions, excavation of basement floor, removal of tree, alterations to front boundary wall, installation of mechanical plant, erection of cupola at roof level, use of part of garden to rear of No.8 Ordnance Hill, and internal works to all floor levels in connection with the use of the building as five residential apartments (2x3 bed, 2x2 bed, and 1x1 bed flats)'; namely, minor repositioning of roof lights, one additional roof light in the north east roof pitch, and minor changes to the dimensions of the roof lights, minor changes to the roof terrace and vent pipes.

Amendments to planning permission dated 18th February 2021 (RN:20/06601/FULL) for Variation of condition 1 of planning permission dated 21.5.20 (RN:19/07406/FULL), which itself varied condition 1 and 9 of planning permission dated 20.11.18 (RN: 18/03520/FULL) which itself varied condition 1 of planning permission dated 12 September 2017 (RN: 16/06423/FULL) for, 'Alterations to the existing building including retention & repair of the front and side facades, part demolition & replacement of the rear facade, rear extension of the 2nd-5th floors, removal of existing & introduction of a new 6th floor, introduction of a new set-back 7th floor, extension of the existing basement levels to include two additional basement levels (including one mezzanine level), installation of roof plant & plant screen, public realm works including hard & soft landscaping, removal of the security kiosks, fencing, bollards & gates/barriers to Blackburne's Mews & Culross Street, removal & replacement of 6 No. trees in front of the Grosvenor Square elevation & re-opening of the road on the western side of the Square, all in connection with the use of the building as a hotel (Class C1) with flexible retail/restaurant use at 1st floor, ground floor and basement 1 (Class A1/Class A3/Class C1), flexible restaurant/bar use at 7th floor (Class A3/Class A4/Class C1), leisure/spa facilities within the basement (Class D2/Class C1) & an ancillary ballroom, event spaces, back of house facilities & associated car, cycle parking & servicing facilities accessed from Blackburne's Mews, & other associated works' - NAMELY, to amend Condition 17 to remove reference to the seventh-floor level [requiring public access] and an additional condition to read as follows: The area at seventh floor level designated as a restaurant/bar (Flexible Class A3/A4/C1) must remain open to members of the general public (whether or not they are guests at the hotel or visitors of hotel guests) on not less than 200 days per year

Amendments to planning permission dated 27 March 2019 (RN: 17/02394/FULL) for alterations and extensions, including demolition and reconstruction of rear extensions, excavation of basement floor, removal of tree, alterations to front boundary wall, installation of mechanical plant, erection of cupola at roof level, use of part of garden to rear of No.8 Ordnance Hill, and internal works to all floor levels in connection with the use of the building as five residential apartments (2x3 bed, 2x2 bed, and 1x1 bed flats). Namely, the omission of swimming pool from lower ground floor, with space being used as a games room and living area, resulting in reduction in overall basement excavation; reduction in the amount of excavation towards the front of the building, meaning that the front wall of the chapel would no longer need to be underpinned; Alterations to the internal layout of accomodation, including omission of duplex flat layout with internal staircase and instead arranging the accommodation as self contained flats on each floor.